I think you're going to have to decide what you want - some of these "we make our own" blinds stores make very good basic blinds. Blind Depot, Blinds To Go, Blinds Of All Kinds, etc. - their products are mostly pretty decent but they might differ on quality of service and price of product and installation.
If you want premium name-brands like Hunter Douglas or Shade-O-Matic and/or if you're looking for advice on colours or complementary decor, etc., go to Randall's or Preston Blinds (Preston Hardware). You will pay way more at these places and for these premium products.
In the case of blinds (as with many things), your budget will guide you.